Comments on H.225v4 and H.323v4

Morgan Potter morgan.potter at BT.COM
Tue Jul 4 11:49:20 EDT 2000


It is definitely possible that there may be multiple routed Gatekeepers
involved in the call.  There are several examples in the H.323 document
which show where the calling and called parties each have a Gatekeeper that
routes call signaling.  However, it is also possible to have routed
Gatekeeper or other entity routing call signaling, such as Border Elements
that possess the ability to route call signaling on the edge of an
administrative domain.

During call transfer, the routed gatekeeper(s) may or may not act upon the
H.450 messages-- that's up to the implementer.  It is certainly legal either

Best Regards,

----- Original Message -----
From: "Wolfgang Bandow" <wolfgang.bandow at DETEWE.DE>
To: <ITU-SG16 at>
Sent: Tuesday, July 04, 2000 5:01 AM
Subject: several gatekeepers

> Hello H.323-Experts,
> in connection with H.323 based IP-telephony in a PISN environment we
> came across the question
> whether it is permitted to have more than two Gatekeepers involved in a
> point to point H.323 connection.
> Is this in line with H.323 conventions?
> >From my point of view this situation also occurs in case of a call
> transfer, if the endpoints are
> located in different zones and the gatekeeper routed model is used.
> Is this correct?
> Thanks a lot in advance for your answer.
> Regards,
> Wolfgang Bandow CT-B / Berlin
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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